admixture

noun4

1. •
   An instance of admixing, a mixing in of something.

   • The admixture of vanilla extract in the dough improved the pastries' flavor.
2. •
   A mixing-in of a biologically or genetically differentiated group to an established stock.

   • Both were lean, raw-boned specimens; the man tall, sandy, and grey-eyed, and the woman short and rather dark, with a black straightness of hair suggesting a slight Indian admixture. — 1928
3. •
   A mixture, in some contexts
4. •
   a mixture composed of entities retaining their individual properties.

   • Background EEG demonstrates an admixture of theta and delta waves.